Adding a 2nd Gas Tank

Having purchased my first Tundra a month ago, its a 2014, I am thinking of adding a 2nd or "saddle" gas tank.
Has anyone done this and if so, any recommendations or advice in doing so. It certainly will add to time to fill up.

 

https://www.tundratalk.net/threads/aux-in-bed-fuel-tank-install.162353/

 

Thank you for that information omgboost.

I am wanting to mount underneath rather than in the bed.

 

Underneath, your options are to swap in the OEM 38 gallon tank or the transfer flow 46 gallon tank. I'm not sure if there are aux tanks for underneath if you already have the bigger fuel tanks.

 

More options than transfer flow. Long range automotive, and I think titan make one?

 

I did the TransferFlow several years ago. Worth every penny! They use to offer it with a bed liner coating, not sure they do that any more. At least it’s not listed on the web site. Might be worth a call to see if they still offer that. Great peace of mind!

 

I'd love for an aux tank on the spare tire location, not ideal, but it sits pretty high up, hardly a place for heavy damage or scraping.